Driving-gear.



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(Application Bled Mar. 22. 1901.)

' 2 Sheets-Sheet I.

(No llodal.)

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No. 686,849. Y -Patented Nuv. I9, IQDI.

L. HAUSMANN. DRIVING GEAR.

(Application led Mar. 22, 1901.) (No Model.) 2 Sheets-Sheet 2.

UNTED STATES PATENT OFFICE.

LUTHER HAUSMANN, OF CHICAGO, ILLINOIS.

DRIVING-G EAR.

SPECIFICATION forming part of Letters .Patent No. 686,849, dated November 19, 1901. Application iiled March 22, 1901. Serial No. 52,387. (No model.)

To @ZZ whom t may concern:

Be it known that I, LUTHER HAUSMANN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Driving-Gear; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that type of driving-gear for bicycles and analogous foot-propelled vehicles which dispense with a drivechain ,connecting-shaf t, or like part for transmitting power from the pedal elements to the drive-wheel, the purpose being to provide a simple, compact, and novel mechanism for attaining the objects aforesaid.

The invention consists, essentially, of an oscillating member constituting the driver, to which the power is applied, a rotary memloer being the driven element, a toothed crescent-shaped segment-bar mounted for reciprocating movement on one driver, and gear elements secured to the other driver to rotate therewith and arranged for cooperating with the toothed portions of the crescent bar.

For a full description of the invention and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and the drawings hereto attached, in which- Figure l is a side elevation of a bicycle, showing the application of the invention. Fig. 2 is a detail section about on the line X X of Fig. l on a larger scale. Fig. 3 is a detail view of an inner crank or driver and the parts attached directly thereto. Fig. 4 isa detail view of the other inner crank or driver and the parts attached directly thereto. Fig. 5 is a transverse section on the line Y Y of Fig. 2. Fig. 6 is a perspective view of the segment-bar and guides. Fig.- 7 is a detail view showing the relation of the parts when the toothed segment-bar is at the limit of its outward movement. Fig. 8 is a view similar to Fig. 7, showing the disposition of the parts when the segment is at the limit of its inward movement. l

` Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

As shown, the driving mechanism is mounted upon an axle l, which is stationary, being rigidly secured to the machine frame, the pedal elements being of such relative length as to come within convenient reach without requiring a too great vertical movement ot' the pedals. The pedal elements comprise crank-arms 2, having eyes at their pivoted ends and mounted upon the axle 1 for oscillatory movement in opposite directions. The eyes formed at the pivotal ends of the arms 2 appear as sleeves or hubs b, and ball-beari ings are interposed between them and the axle l. Y

The cranks 3 and 4 are secured to the inner ends of the eyes or sleeves b to move with the pedal elements, and their rear ends are toothed and of segment form, as indicated at a, to mesh with a pinion 8, mounted upon a spindle l0, projecting rigidly from the axle l intermediate of its ends. By having the segment-cranks 3 and 4 connected in the manner stated they receive a simultaneous movement in opposite directions. Ball-bearings are interposed between the pinion 8 and the spindle 10. The segment-cranks 3 and 4 constitute the drivers, since the force to be expended is imparted thereto. A gear-wheel 5 is mounted upon the outer side of driver 3 and is provided centrally with a pin c, which passes loosely through an opening in the driver and has a pinion 7 rigidly attached to its inner end in such a manner as to cause the parts 5 and 7 to rotate as a single element. Ball-bearings are provided between driver 3 l and the gear elements 5 and 7 and centralize the latter with reference to the pin c and the i opening in the driver through which said pin passes.

A gear-wheel 6 is in meshing relation with the gear-wheel 5 and is the driven element, and power is taken therefrom to rotate the part to be driven, which in the present instance is the rear wheel of the bicycle. The gearwheel 6 is firmly attached to a side 12 of `the cylinder or casing d, which houses the drive mechanism and forms a hub for the drive-wheel c. The driver 4, on which the toothed crescent-shaped segment-bar 9 has rectilinear movement, is provided with grooves f at its edges, in which are fitted bars or guides g, with which the segment-bar has rm attachment. The segment bar` is directed in its rectilinear movement by the driver 4, upon which it is slidably mounted. Vings 11 are provided at the ends of the toothed segment 9, and their edges adjacent to the driver 4 have the bars g, which latter are by preference formed with wngs,although they may be separate and attached thereto. The outer ends and the inner edges of the wings 11 have laterally extending ribs 17, which constitute guides or tracks for the inner end 18 of the pin c to travel upon when shifting the bar 9 on the driver 4. An edge portion of the driver 4 is made adjustable, as shown at 15, for the dual purpose of taking up wear between the bars g and the driver and to admit of the segment-bar 9 being placed in position or removed without requiring the displacement or detachment of the driver from the pedal element or casing. A stop 19 is located near the inner end of the driver 4 and is formed with a cog at its outer end to engage with the inner set of teeth of the segmentbar and steady the same during the travel of the pinion 7 over the teeth at the outer edge of said bar. This stop 19 forms a part of a plate 2O of approximately triangular forni and having its edges outwardly divergent and adapted to be engaged by stops 21, secured to the inner side of the driver 3. A pair of stops 22 are provided at the outer end .of the driver 4 and are adapted to engage with the outer set of teeth of the bar 9 when the latter is at the limit of its outward movement, so as to steady and hold it in place while the pinion 7 is traveling over the teeth at the inner edge of the said bar 9. These stops 22 are formed at theends of a bar 23, applied to the outer end of the driver 4.

The casing or housing d is of a circular outline and comprises side plates or disks 12 ing and mountings and constitutes a hub for the drive-wheel, the spokes 14 of which connect the rim of the casing with the rim of the wheel. A side or plate of the casing is removable to admit of access being readily had to the interior for cleaning, oiling and making repairs.

In practice the pedal elements are oscillated in opposite directions, this movement the intermediate connecting-pinion 8. As the pedal elements are oscillated the inner cranks or drivers 3 and 4 are correspondingly moved, and as a result the pinion 7 and toothed segment-bar 9 are alternately moved back and forth in a curved path. When the pinion 7 reaches one end of the toothed segment-bar 9, the projecting end 18 of the pinion or axle c comes in contact with the rib or guide 17 and in conjunction with the pinion eects a radial shifting of the bar 9 on the driver 4, whereby the pinion is caused to travel over the teeth upon the opposite edge of the said bar upon its reverse travel. When the said pinion reaches the opposite end of the bar 9, a like movement takes place and the bar is shifted radially in an opposite direction, so as to bring the pinion in 1 position to travel to over the teeth ofthe bar 9 with which it previously coperated. When the bar is moved inward, it engages with the stop 19 and is braced and held fast thereby, and when itis moved outward the said bar engages with the stops 22 and is braced and made secure thereby The pinion 7 travels around the toothed edges of the bar 9 as the pedal elements are oscillated, and as a result continuous rotary movement is imparted to the gear- Wheel 5 and the gear elements 6 vintermeshing therewith and to the drive-wheel connected with the said gear elements 6, in the manner stated. A plate 16 connects the bars g and is located upon the opposite side of the driver 4 to the bar 9.

Having thus described the invention, what is claimed as new is- 1. In drive-gear cf the character described a pair of oscillatory drivers, a rotary gear element mounted upon one of the said drivers and adapted to impart motion to the part to be driven, a toothed segment-bar fitted to the other driver and slidable thereon, and means for shifting the toothed segment-bar on the driver, whereby the gear is rotated continuously in the same direction, substantially as set forth.

2. In drive-gear of the character described, oscillatory drivers, a rotary gear element applied to one of said drivers, a toothed segvment-bar slidably mounted upon the other 'driver and provided at its ends with guides, and an extension in coaxial alinement with the rotary gear element for cooperation with the guides at the ends of the toothed segment-bar to effect a shifting of the latter, as and for the purpose set forth. and a rim 13, and this casing houses the gear- 3. In drive-gear of the character described,

lan oscillatory driver, a rotary gear element l applied thereto, a toothed segment mounted for radial reciprocatory movement, coperatg ing means between the rotary gear element E and the toothed segment for shifting the latter, and inner and outer stops to engage with the teeth of said toothed segment to brace and fix the position thereof at its extreme movements, substantially as set forth.

being assured by the toothed segments a and l 4. In drive-gear of the character described,

lan oscillatory driver, a rotary gear element carried thereby, a toothed segment mounted for radial reciprocating movement, coperating means between the toothed segment and rotary gear element for shifting said segment, and cooperating pairs of stops carried by the said oscillatory driver and the toothed-segment support for limiting the oscillatory movement of the said driver, substantially as specified.

5. In drive-gear of the character described, and in combination with an oscillatory driver ICO IIO

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and a rotary gear element carried thereby, a toothed segment-bar, parallel guide-bars at the ends of the toothed segment-bar for cooperation With a supporting-guide,and curved guides at the ends of the toothed segment for coperation with the rotary gear element to effect a radial shifting of the toothed segment, substantially as set forth.

6. In combination, a support, a toothed segment-bar, wings at the ends of the toothed segment and embracing the support and serving to guide the segment in its radial movements, curved guides at the outer edge of the said Wings, an oscillatory driver, and a rotary gear element carried by the said rotary driver and adapted to cooperate with the toothed segment and the aforesaid curved guides, substantially as set forth.

7. In combination, a pair of oscillatory dri vers mounted to move in opposite directions, a rotary gear element carried by one of the drivers, a toothed segment slidably mounted upon the other driver, pairs of guides at the ends of the toothed segment, cooperating stops to limit the oscillatory movements of the drivers, and inner and outer stops to engage with the teeth of the toothed segment to brace the latter and x its position when at the limit of its extreme movements, substantially as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

LUTHER HAUSMANN.'

Vitnesses:

W. J. NEEBES, Jr., MARK C. KELLER. 

